4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <linux/f2fs_fs.h>
13 #include <linux/stat.h>
14 #include <linux/buffer_head.h>
15 #include <linux/writeback.h>
16 #include <linux/blkdev.h>
17 #include <linux/falloc.h>
18 #include <linux/types.h>
19 #include <linux/compat.h>
20 #include <linux/uaccess.h>
21 #include <linux/mount.h>
22 #include <linux/pagevec.h>
30 #include <trace/events/f2fs.h>
32 static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
35 struct page *page = vmf->page;
36 struct inode *inode = file_inode(vma->vm_file);
37 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
38 struct dnode_of_data dn;
43 sb_start_pagefault(inode->i_sb);
45 f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
47 /* block allocation */
49 set_new_dnode(&dn, inode, NULL, NULL, 0);
50 err = f2fs_reserve_block(&dn, page->index);
58 file_update_time(vma->vm_file);
60 if (unlikely(page->mapping != inode->i_mapping ||
61 page_offset(page) > i_size_read(inode) ||
62 !PageUptodate(page))) {
69 * check to see if the page is mapped already (no holes)
71 if (PageMappedToDisk(page))
74 /* page is wholly or partially inside EOF */
75 if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
77 offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
78 zero_user_segment(page, offset, PAGE_CACHE_SIZE);
81 SetPageUptodate(page);
83 trace_f2fs_vm_page_mkwrite(page, DATA);
86 f2fs_wait_on_page_writeback(page, DATA);
88 sb_end_pagefault(inode->i_sb);
89 return block_page_mkwrite_return(err);
92 static const struct vm_operations_struct f2fs_file_vm_ops = {
93 .fault = filemap_fault,
94 .map_pages = filemap_map_pages,
95 .page_mkwrite = f2fs_vm_page_mkwrite,
98 static int get_parent_ino(struct inode *inode, nid_t *pino)
100 struct dentry *dentry;
102 inode = igrab(inode);
103 dentry = d_find_any_alias(inode);
108 if (update_dent_inode(inode, &dentry->d_name)) {
113 *pino = parent_ino(dentry);
118 static inline bool need_do_checkpoint(struct inode *inode)
120 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
121 bool need_cp = false;
123 if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
125 else if (file_wrong_pino(inode))
127 else if (!space_for_roll_forward(sbi))
129 else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
131 else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
133 else if (test_opt(sbi, FASTBOOT))
135 else if (sbi->active_logs == 2)
141 static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
143 struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
145 /* But we need to avoid that there are some inode updates */
146 if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino))
152 static void try_to_fix_pino(struct inode *inode)
154 struct f2fs_inode_info *fi = F2FS_I(inode);
157 down_write(&fi->i_sem);
159 if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
160 get_parent_ino(inode, &pino)) {
162 file_got_pino(inode);
163 up_write(&fi->i_sem);
165 mark_inode_dirty_sync(inode);
166 f2fs_write_inode(inode, NULL);
168 up_write(&fi->i_sem);
172 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
174 struct inode *inode = file->f_mapping->host;
175 struct f2fs_inode_info *fi = F2FS_I(inode);
176 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
177 nid_t ino = inode->i_ino;
179 bool need_cp = false;
180 struct writeback_control wbc = {
181 .sync_mode = WB_SYNC_ALL,
182 .nr_to_write = LONG_MAX,
186 if (unlikely(f2fs_readonly(inode->i_sb)))
189 trace_f2fs_sync_file_enter(inode);
191 /* if fdatasync is triggered, let's do in-place-update */
192 if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
193 set_inode_flag(fi, FI_NEED_IPU);
194 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
195 clear_inode_flag(fi, FI_NEED_IPU);
198 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
202 /* if the inode is dirty, let's recover all the time */
203 if (!datasync && is_inode_flag_set(fi, FI_DIRTY_INODE)) {
204 update_inode_page(inode);
209 * if there is no written data, don't waste time to write recovery info.
211 if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
212 !exist_written_data(sbi, ino, APPEND_INO)) {
214 /* it may call write_inode just prior to fsync */
215 if (need_inode_page_update(sbi, ino))
218 if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
219 exist_written_data(sbi, ino, UPDATE_INO))
224 /* guarantee free sections for fsync */
225 f2fs_balance_fs(sbi);
228 * Both of fdatasync() and fsync() are able to be recovered from
231 down_read(&fi->i_sem);
232 need_cp = need_do_checkpoint(inode);
236 /* all the dirty node pages should be flushed for POR */
237 ret = f2fs_sync_fs(inode->i_sb, 1);
240 * We've secured consistency through sync_fs. Following pino
241 * will be used only for fsynced inodes after checkpoint.
243 try_to_fix_pino(inode);
244 clear_inode_flag(fi, FI_APPEND_WRITE);
245 clear_inode_flag(fi, FI_UPDATE_WRITE);
249 sync_node_pages(sbi, ino, &wbc);
251 /* if cp_error was enabled, we should avoid infinite loop */
252 if (unlikely(f2fs_cp_error(sbi)))
255 if (need_inode_block_update(sbi, ino)) {
256 mark_inode_dirty_sync(inode);
257 f2fs_write_inode(inode, NULL);
261 ret = wait_on_node_pages_writeback(sbi, ino);
265 /* once recovery info is written, don't need to tack this */
266 remove_dirty_inode(sbi, ino, APPEND_INO);
267 clear_inode_flag(fi, FI_APPEND_WRITE);
269 remove_dirty_inode(sbi, ino, UPDATE_INO);
270 clear_inode_flag(fi, FI_UPDATE_WRITE);
271 ret = f2fs_issue_flush(sbi);
273 trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
274 f2fs_trace_ios(NULL, NULL, 1);
278 static pgoff_t __get_first_dirty_index(struct address_space *mapping,
279 pgoff_t pgofs, int whence)
284 if (whence != SEEK_DATA)
287 /* find first dirty page index */
288 pagevec_init(&pvec, 0);
289 nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
290 PAGECACHE_TAG_DIRTY, 1);
291 pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
292 pagevec_release(&pvec);
296 static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
301 if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
302 (blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
306 if (blkaddr == NULL_ADDR)
313 static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
315 struct inode *inode = file->f_mapping->host;
316 loff_t maxbytes = inode->i_sb->s_maxbytes;
317 struct dnode_of_data dn;
318 pgoff_t pgofs, end_offset, dirty;
319 loff_t data_ofs = offset;
323 mutex_lock(&inode->i_mutex);
325 isize = i_size_read(inode);
329 /* handle inline data case */
330 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
331 if (whence == SEEK_HOLE)
336 pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT);
338 dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
340 for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) {
341 set_new_dnode(&dn, inode, NULL, NULL, 0);
342 err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
343 if (err && err != -ENOENT) {
345 } else if (err == -ENOENT) {
346 /* direct node does not exists */
347 if (whence == SEEK_DATA) {
348 pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
356 end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
358 /* find data/hole in dnode block */
359 for (; dn.ofs_in_node < end_offset;
360 dn.ofs_in_node++, pgofs++,
361 data_ofs = (loff_t)pgofs << PAGE_CACHE_SHIFT) {
363 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
365 if (__found_offset(blkaddr, dirty, pgofs, whence)) {
373 if (whence == SEEK_DATA)
376 if (whence == SEEK_HOLE && data_ofs > isize)
378 mutex_unlock(&inode->i_mutex);
379 return vfs_setpos(file, data_ofs, maxbytes);
381 mutex_unlock(&inode->i_mutex);
385 static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
387 struct inode *inode = file->f_mapping->host;
388 loff_t maxbytes = inode->i_sb->s_maxbytes;
394 return generic_file_llseek_size(file, offset, whence,
395 maxbytes, i_size_read(inode));
400 return f2fs_seek_block(file, offset, whence);
406 static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
408 struct inode *inode = file_inode(file);
410 /* we don't need to use inline_data strictly */
411 if (f2fs_has_inline_data(inode)) {
412 int err = f2fs_convert_inline_inode(inode);
418 vma->vm_ops = &f2fs_file_vm_ops;
422 int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
424 int nr_free = 0, ofs = dn->ofs_in_node;
425 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
426 struct f2fs_node *raw_node;
429 raw_node = F2FS_NODE(dn->node_page);
430 addr = blkaddr_in_node(raw_node) + ofs;
432 for (; count > 0; count--, addr++, dn->ofs_in_node++) {
433 block_t blkaddr = le32_to_cpu(*addr);
434 if (blkaddr == NULL_ADDR)
437 dn->data_blkaddr = NULL_ADDR;
438 set_data_blkaddr(dn);
439 f2fs_update_extent_cache(dn);
440 invalidate_blocks(sbi, blkaddr);
441 if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
442 clear_inode_flag(F2FS_I(dn->inode),
443 FI_FIRST_BLOCK_WRITTEN);
447 dec_valid_block_count(sbi, dn->inode, nr_free);
448 set_page_dirty(dn->node_page);
451 dn->ofs_in_node = ofs;
453 trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
454 dn->ofs_in_node, nr_free);
458 void truncate_data_blocks(struct dnode_of_data *dn)
460 truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
463 static int truncate_partial_data_page(struct inode *inode, u64 from,
466 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
469 if (!offset && !force)
472 page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, force);
477 if (unlikely(!PageUptodate(page) ||
478 page->mapping != inode->i_mapping))
481 f2fs_wait_on_page_writeback(page, DATA);
482 zero_user(page, offset, PAGE_CACHE_SIZE - offset);
484 set_page_dirty(page);
486 f2fs_put_page(page, 1);
490 int truncate_blocks(struct inode *inode, u64 from, bool lock)
492 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
493 unsigned int blocksize = inode->i_sb->s_blocksize;
494 struct dnode_of_data dn;
496 int count = 0, err = 0;
498 bool truncate_page = false;
500 trace_f2fs_truncate_blocks_enter(inode, from);
502 free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
507 ipage = get_node_page(sbi, inode->i_ino);
509 err = PTR_ERR(ipage);
513 if (f2fs_has_inline_data(inode)) {
514 if (truncate_inline_inode(ipage, from))
515 set_page_dirty(ipage);
516 f2fs_put_page(ipage, 1);
517 truncate_page = true;
521 set_new_dnode(&dn, inode, ipage, NULL, 0);
522 err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
529 count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
531 count -= dn.ofs_in_node;
532 f2fs_bug_on(sbi, count < 0);
534 if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
535 truncate_data_blocks_range(&dn, count);
541 err = truncate_inode_blocks(inode, free_from);
546 /* lastly zero out the first data page */
548 err = truncate_partial_data_page(inode, from, truncate_page);
550 trace_f2fs_truncate_blocks_exit(inode, err);
554 void f2fs_truncate(struct inode *inode)
556 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
557 S_ISLNK(inode->i_mode)))
560 trace_f2fs_truncate(inode);
562 /* we should check inline_data size */
563 if (f2fs_has_inline_data(inode) && !f2fs_may_inline(inode)) {
564 if (f2fs_convert_inline_inode(inode))
568 if (!truncate_blocks(inode, i_size_read(inode), true)) {
569 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
570 mark_inode_dirty(inode);
574 int f2fs_getattr(struct vfsmount *mnt,
575 struct dentry *dentry, struct kstat *stat)
577 struct inode *inode = dentry->d_inode;
578 generic_fillattr(inode, stat);
583 #ifdef CONFIG_F2FS_FS_POSIX_ACL
584 static void __setattr_copy(struct inode *inode, const struct iattr *attr)
586 struct f2fs_inode_info *fi = F2FS_I(inode);
587 unsigned int ia_valid = attr->ia_valid;
589 if (ia_valid & ATTR_UID)
590 inode->i_uid = attr->ia_uid;
591 if (ia_valid & ATTR_GID)
592 inode->i_gid = attr->ia_gid;
593 if (ia_valid & ATTR_ATIME)
594 inode->i_atime = timespec_trunc(attr->ia_atime,
595 inode->i_sb->s_time_gran);
596 if (ia_valid & ATTR_MTIME)
597 inode->i_mtime = timespec_trunc(attr->ia_mtime,
598 inode->i_sb->s_time_gran);
599 if (ia_valid & ATTR_CTIME)
600 inode->i_ctime = timespec_trunc(attr->ia_ctime,
601 inode->i_sb->s_time_gran);
602 if (ia_valid & ATTR_MODE) {
603 umode_t mode = attr->ia_mode;
605 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
607 set_acl_inode(fi, mode);
611 #define __setattr_copy setattr_copy
614 int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
616 struct inode *inode = dentry->d_inode;
617 struct f2fs_inode_info *fi = F2FS_I(inode);
620 err = inode_change_ok(inode, attr);
624 if (attr->ia_valid & ATTR_SIZE) {
625 if (attr->ia_size != i_size_read(inode)) {
626 truncate_setsize(inode, attr->ia_size);
627 f2fs_truncate(inode);
628 f2fs_balance_fs(F2FS_I_SB(inode));
631 * giving a chance to truncate blocks past EOF which
632 * are fallocated with FALLOC_FL_KEEP_SIZE.
634 f2fs_truncate(inode);
638 __setattr_copy(inode, attr);
640 if (attr->ia_valid & ATTR_MODE) {
641 err = posix_acl_chmod(inode, get_inode_mode(inode));
642 if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
643 inode->i_mode = fi->i_acl_mode;
644 clear_inode_flag(fi, FI_ACL_MODE);
648 mark_inode_dirty(inode);
652 const struct inode_operations f2fs_file_inode_operations = {
653 .getattr = f2fs_getattr,
654 .setattr = f2fs_setattr,
655 .get_acl = f2fs_get_acl,
656 .set_acl = f2fs_set_acl,
657 #ifdef CONFIG_F2FS_FS_XATTR
658 .setxattr = generic_setxattr,
659 .getxattr = generic_getxattr,
660 .listxattr = f2fs_listxattr,
661 .removexattr = generic_removexattr,
663 .fiemap = f2fs_fiemap,
666 static void fill_zero(struct inode *inode, pgoff_t index,
667 loff_t start, loff_t len)
669 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
675 f2fs_balance_fs(sbi);
678 page = get_new_data_page(inode, NULL, index, false);
682 f2fs_wait_on_page_writeback(page, DATA);
683 zero_user(page, start, len);
684 set_page_dirty(page);
685 f2fs_put_page(page, 1);
689 int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
694 for (index = pg_start; index < pg_end; index++) {
695 struct dnode_of_data dn;
697 set_new_dnode(&dn, inode, NULL, NULL, 0);
698 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
705 if (dn.data_blkaddr != NULL_ADDR)
706 truncate_data_blocks_range(&dn, 1);
712 static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
714 pgoff_t pg_start, pg_end;
715 loff_t off_start, off_end;
718 if (!S_ISREG(inode->i_mode))
721 /* skip punching hole beyond i_size */
722 if (offset >= inode->i_size)
725 if (f2fs_has_inline_data(inode)) {
726 ret = f2fs_convert_inline_inode(inode);
731 pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
732 pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
734 off_start = offset & (PAGE_CACHE_SIZE - 1);
735 off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
737 if (pg_start == pg_end) {
738 fill_zero(inode, pg_start, off_start,
739 off_end - off_start);
742 fill_zero(inode, pg_start++, off_start,
743 PAGE_CACHE_SIZE - off_start);
745 fill_zero(inode, pg_end, 0, off_end);
747 if (pg_start < pg_end) {
748 struct address_space *mapping = inode->i_mapping;
749 loff_t blk_start, blk_end;
750 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
752 f2fs_balance_fs(sbi);
754 blk_start = pg_start << PAGE_CACHE_SHIFT;
755 blk_end = pg_end << PAGE_CACHE_SHIFT;
756 truncate_inode_pages_range(mapping, blk_start,
760 ret = truncate_hole(inode, pg_start, pg_end);
768 static int expand_inode_data(struct inode *inode, loff_t offset,
769 loff_t len, int mode)
771 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
772 pgoff_t index, pg_start, pg_end;
773 loff_t new_size = i_size_read(inode);
774 loff_t off_start, off_end;
777 f2fs_balance_fs(sbi);
779 ret = inode_newsize_ok(inode, (len + offset));
783 if (f2fs_has_inline_data(inode)) {
784 ret = f2fs_convert_inline_inode(inode);
789 pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
790 pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
792 off_start = offset & (PAGE_CACHE_SIZE - 1);
793 off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
797 for (index = pg_start; index <= pg_end; index++) {
798 struct dnode_of_data dn;
800 if (index == pg_end && !off_end)
803 set_new_dnode(&dn, inode, NULL, NULL, 0);
804 ret = f2fs_reserve_block(&dn, index);
808 if (pg_start == pg_end)
809 new_size = offset + len;
810 else if (index == pg_start && off_start)
811 new_size = (index + 1) << PAGE_CACHE_SHIFT;
812 else if (index == pg_end)
813 new_size = (index << PAGE_CACHE_SHIFT) + off_end;
815 new_size += PAGE_CACHE_SIZE;
818 if (!(mode & FALLOC_FL_KEEP_SIZE) &&
819 i_size_read(inode) < new_size) {
820 i_size_write(inode, new_size);
821 mark_inode_dirty(inode);
822 update_inode_page(inode);
829 static long f2fs_fallocate(struct file *file, int mode,
830 loff_t offset, loff_t len)
832 struct inode *inode = file_inode(file);
835 if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
838 mutex_lock(&inode->i_mutex);
840 if (mode & FALLOC_FL_PUNCH_HOLE)
841 ret = punch_hole(inode, offset, len);
843 ret = expand_inode_data(inode, offset, len, mode);
846 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
847 mark_inode_dirty(inode);
850 mutex_unlock(&inode->i_mutex);
852 trace_f2fs_fallocate(inode, mode, offset, len, ret);
856 static int f2fs_release_file(struct inode *inode, struct file *filp)
858 /* some remained atomic pages should discarded */
859 if (f2fs_is_atomic_file(inode))
860 commit_inmem_pages(inode, true);
861 if (f2fs_is_volatile_file(inode)) {
862 set_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
863 filemap_fdatawrite(inode->i_mapping);
864 clear_inode_flag(F2FS_I(inode), FI_DROP_CACHE);
869 #define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
870 #define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
872 static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
876 else if (S_ISREG(mode))
877 return flags & F2FS_REG_FLMASK;
879 return flags & F2FS_OTHER_FLMASK;
882 static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
884 struct inode *inode = file_inode(filp);
885 struct f2fs_inode_info *fi = F2FS_I(inode);
886 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
887 return put_user(flags, (int __user *)arg);
890 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
892 struct inode *inode = file_inode(filp);
893 struct f2fs_inode_info *fi = F2FS_I(inode);
894 unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
895 unsigned int oldflags;
898 ret = mnt_want_write_file(filp);
902 if (!inode_owner_or_capable(inode)) {
907 if (get_user(flags, (int __user *)arg)) {
912 flags = f2fs_mask_flags(inode->i_mode, flags);
914 mutex_lock(&inode->i_mutex);
916 oldflags = fi->i_flags;
918 if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
919 if (!capable(CAP_LINUX_IMMUTABLE)) {
920 mutex_unlock(&inode->i_mutex);
926 flags = flags & FS_FL_USER_MODIFIABLE;
927 flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
929 mutex_unlock(&inode->i_mutex);
931 f2fs_set_inode_flags(inode);
932 inode->i_ctime = CURRENT_TIME;
933 mark_inode_dirty(inode);
935 mnt_drop_write_file(filp);
939 static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
941 struct inode *inode = file_inode(filp);
943 return put_user(inode->i_generation, (int __user *)arg);
946 static int f2fs_ioc_start_atomic_write(struct file *filp)
948 struct inode *inode = file_inode(filp);
950 if (!inode_owner_or_capable(inode))
953 f2fs_balance_fs(F2FS_I_SB(inode));
955 if (f2fs_is_atomic_file(inode))
958 set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
960 return f2fs_convert_inline_inode(inode);
963 static int f2fs_ioc_commit_atomic_write(struct file *filp)
965 struct inode *inode = file_inode(filp);
968 if (!inode_owner_or_capable(inode))
971 if (f2fs_is_volatile_file(inode))
974 ret = mnt_want_write_file(filp);
978 if (f2fs_is_atomic_file(inode))
979 commit_inmem_pages(inode, false);
981 ret = f2fs_sync_file(filp, 0, LONG_MAX, 0);
982 mnt_drop_write_file(filp);
983 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
987 static int f2fs_ioc_start_volatile_write(struct file *filp)
989 struct inode *inode = file_inode(filp);
991 if (!inode_owner_or_capable(inode))
994 if (f2fs_is_volatile_file(inode))
997 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
999 return f2fs_convert_inline_inode(inode);
1002 static int f2fs_ioc_release_volatile_write(struct file *filp)
1004 struct inode *inode = file_inode(filp);
1006 if (!inode_owner_or_capable(inode))
1009 if (!f2fs_is_volatile_file(inode))
1012 if (!f2fs_is_first_block_written(inode))
1013 return truncate_partial_data_page(inode, 0, true);
1015 punch_hole(inode, 0, F2FS_BLKSIZE);
1019 static int f2fs_ioc_abort_volatile_write(struct file *filp)
1021 struct inode *inode = file_inode(filp);
1024 if (!inode_owner_or_capable(inode))
1027 ret = mnt_want_write_file(filp);
1031 f2fs_balance_fs(F2FS_I_SB(inode));
1033 if (f2fs_is_atomic_file(inode)) {
1034 commit_inmem_pages(inode, false);
1035 clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
1038 if (f2fs_is_volatile_file(inode)) {
1039 clear_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1040 filemap_fdatawrite(inode->i_mapping);
1041 set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
1043 mnt_drop_write_file(filp);
1047 static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
1049 struct inode *inode = file_inode(filp);
1050 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1051 struct super_block *sb = sbi->sb;
1054 if (!capable(CAP_SYS_ADMIN))
1057 if (get_user(in, (__u32 __user *)arg))
1061 case F2FS_GOING_DOWN_FULLSYNC:
1062 sb = freeze_bdev(sb->s_bdev);
1063 if (sb && !IS_ERR(sb)) {
1064 f2fs_stop_checkpoint(sbi);
1065 thaw_bdev(sb->s_bdev, sb);
1068 case F2FS_GOING_DOWN_METASYNC:
1069 /* do checkpoint only */
1070 f2fs_sync_fs(sb, 1);
1071 f2fs_stop_checkpoint(sbi);
1073 case F2FS_GOING_DOWN_NOSYNC:
1074 f2fs_stop_checkpoint(sbi);
1082 static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
1084 struct inode *inode = file_inode(filp);
1085 struct super_block *sb = inode->i_sb;
1086 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1087 struct fstrim_range range;
1090 if (!capable(CAP_SYS_ADMIN))
1093 if (!blk_queue_discard(q))
1096 if (copy_from_user(&range, (struct fstrim_range __user *)arg,
1100 range.minlen = max((unsigned int)range.minlen,
1101 q->limits.discard_granularity);
1102 ret = f2fs_trim_fs(F2FS_SB(sb), &range);
1106 if (copy_to_user((struct fstrim_range __user *)arg, &range,
1112 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
1115 case F2FS_IOC_GETFLAGS:
1116 return f2fs_ioc_getflags(filp, arg);
1117 case F2FS_IOC_SETFLAGS:
1118 return f2fs_ioc_setflags(filp, arg);
1119 case F2FS_IOC_GETVERSION:
1120 return f2fs_ioc_getversion(filp, arg);
1121 case F2FS_IOC_START_ATOMIC_WRITE:
1122 return f2fs_ioc_start_atomic_write(filp);
1123 case F2FS_IOC_COMMIT_ATOMIC_WRITE:
1124 return f2fs_ioc_commit_atomic_write(filp);
1125 case F2FS_IOC_START_VOLATILE_WRITE:
1126 return f2fs_ioc_start_volatile_write(filp);
1127 case F2FS_IOC_RELEASE_VOLATILE_WRITE:
1128 return f2fs_ioc_release_volatile_write(filp);
1129 case F2FS_IOC_ABORT_VOLATILE_WRITE:
1130 return f2fs_ioc_abort_volatile_write(filp);
1131 case F2FS_IOC_SHUTDOWN:
1132 return f2fs_ioc_shutdown(filp, arg);
1134 return f2fs_ioc_fitrim(filp, arg);
1140 #ifdef CONFIG_COMPAT
1141 long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1144 case F2FS_IOC32_GETFLAGS:
1145 cmd = F2FS_IOC_GETFLAGS;
1147 case F2FS_IOC32_SETFLAGS:
1148 cmd = F2FS_IOC_SETFLAGS;
1151 return -ENOIOCTLCMD;
1153 return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
1157 const struct file_operations f2fs_file_operations = {
1158 .llseek = f2fs_llseek,
1159 .read_iter = generic_file_read_iter,
1160 .write_iter = generic_file_write_iter,
1161 .open = generic_file_open,
1162 .release = f2fs_release_file,
1163 .mmap = f2fs_file_mmap,
1164 .fsync = f2fs_sync_file,
1165 .fallocate = f2fs_fallocate,
1166 .unlocked_ioctl = f2fs_ioctl,
1167 #ifdef CONFIG_COMPAT
1168 .compat_ioctl = f2fs_compat_ioctl,
1170 .splice_read = generic_file_splice_read,
1171 .splice_write = iter_file_splice_write,